Effect of Aspect Ratio on Laminar Natural Convection in Partially Heated Enclosure

In this study, the influences of aspect ratio and Rayleigh number have been studied for a square cavity. The constant partial cooling at left vertical wall and partial heating at the right vertical wall along with the adiabatic top and bottom walls of cavity filled with the water. The aspect ratio was varied from 0.5 to 4. The governing equations are solved with finite volume approach for the range of Rayleigh number as 1000 to 1000000. Results have clearly indicated Heat transfer enhances with increasing of Rayleigh number for the whole of aspect ratio. The results show the Nusselt number increases from aspect ratio 0.5 to 1 and beyond that it decreases smoothly.